SLC 500 Thermocouple/mV Analog Input Module
13
Publication 1746-5.23
Cold Junction Compensation (CJC)
To obtain accurate readings from each of the channels, the cold-junction
temperature (temperature at the module’s terminal junction between the
thermocouple wire and the input channel) must be compensated for. Two cold
junction compensating sensors are integrated in the removable terminal block.
They must remain installed to retain accuracy.
!
ATTENTION: Do not remove or loosen the cold junction
compensating temperature transducers located on the terminal
block. Both CJCs are critical to ensure accurate thermocouple
input readings at each channel. The module will not operate in
thermocouple mode if a CJC is not connected.
Failure to observe this precaution can cause unintended
equipment operation and damage.
Spare Allen-Bradley Parts
